Flora of North America species comparison

erect, usually pubescent, rarely glabrate or glabrous, glandular nearly throughout, gland-dotted when young.

4–10(–15) dm, densely gland-dotted when young, silky-pilosulous, hairs retrorse.

divaricate;

sterile shoots almost sharp-tipped.

alternate, odd-pinnate or unifoliolate;

stipules present, caducous, usually triangular to subulate or linear, rarely obovate;

petiolate;

leaflets 1–17(or 19), stipels absent, blade margins entire or gland-crenulate, surfaces usually glandular-punctate abaxially, pubescent.

pinnate, 0.7–2.7 cm;

leaflets 7–13, blades obovate to suborbiculate, 1–4.5 mm, terminal leaflet shorter than laterals, surfaces with submarginal and apical glands abaxially, glands visible, pubescent.

dense to relatively loose;

rachis not spine-tipped in anthesis, 0.3–3 cm;

bracts lanceolate or linear-lanceolate, 1.6–6.5 mm;

bracteoles absent.

1–20+-flowered, terminal and axillary (sometimes leaf-opposed), usually racemes, rarely spikes;

bracts present, caducous;

bracteoles 0 or 2, at apex of pedicel or base of calyx.

papilionaceous;

calyx campanulate, lobes 5, unequal;

ribs 10, not anastomosing into closed arches distally;

corolla usually blue, blue-purple, pink-purple, magenta-purple, violet-purple, violet, or bicolored, sometimes with yellow eye, rarely white;

banner blade differentiated from claw, reflexed less than 90°, claw shorter;

wings not adnate to keel, blades oblique basally, claws shorter, linear;

keel not strongly twisted, blades narrowly overlapping and adherent, oblique basally, blunt-tipped, claws linear;

stamens 10, monadelphous, equal or alternately short and long;

anthers dorsifixed;

style glabrous or pilosulous.

calyx 3.9–5.3(–8.3) mm, pilosulous throughout or tube glabrous, tube 1.9–2.8(–3) mm, ribs prominent, intervals each with 1 row of 2–6 glands, lobes triangular-lanceolate to lanceolate, abaxial lobe longer;

corolla pink-purple, banner with yellow eye;

banner 4.6–6.1(–6.6) mm, ovate-cordate, ovate, base cordate, apex emarginate, claw linear;

wings oblong, 4–5(–5.4) × 1.5–2.1 mm;

keel obovate, (3.7–)4–5.3 × 2.4–3.7 mm;

stamens 5.2–6.8 mm;

filaments distinct to (1.5–)2–3 mm;

anthers (0.5–)0.6–0.8(–1) mm, connective gland-tipped.

legumes, sessile, mostly tan, plump to compressed, obovoid, ovoid-ellipsoid, obovoid-ellipsoid, or obliquely obovoid or ellipsoid, indehiscent, often membranous proximally, thickened distally, gland-dotted, glabrous or pubescent.

obliquely obovoid, 2.5 mm, with large glands distally, glabrous proximally, sparsely pilosulous distally.

usually 1, rarely 2, chestnut to brownish or greenish, sometimes with brown or purple spots, somewhat compressed, oblong.

2–2.5 mm.

= 10.